1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86b64100d4b6859b7b9f8ecc1737c2c475b26531a268e7a8b8ae9bea58e215a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fdf625-1d2e-4ab9-b2aa-7550a45793da.json and https://artists.proofprofile.net/proofs/artist/50fdf625-1d2e-4ab9-b2aa-7550a45793da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8a3de36ad799ccfbe2de3ec8532886f6c1d2cb9a795cef0c292e0adb6e290. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57428022aa0812622a3a4fa9632a7bd671b2797aea1fae00cd73c502822da6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7b7e08a073e933a7db7dcb29d7f10f515aec6abb26d86c20a661212a12a577. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976b2ff0e15ad4dc7fb2c5bb16a86a4fd7abf912826617c59fe8b35876acf4e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bca6f2e059fe67431a09ff3fa76c9824db2d4cb85f23efe023103d23a57df0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1289be2bcf5d201c87d563308e2e6864dcd970829ef4983b3804d29a04211897. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be44de6cc761d857e027c65136553d40c56db541cf7ff166daeb8d833985623. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2302159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417a0fa85fedc8141bc4cea1e2c3f4cb697fb6ee1409c079faced994de03fd60. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2317131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc83fadab48ca49659512e0329de23768c1c082a72aebffb72c784073aef38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762027742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02025ed912bec740fc71a89a1e6a0b243396aba13ea0705bae9c849c9b3b0e7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762081357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d4bc1e17040e57da69e5ba0192b4d93a07d24635e1151d65e53cbb9f8d586. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2154705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8cb8b70e0b584e17bd3318b20c34b524bbfad381dc38ae1e614f744370b7af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163daa106f19b951799ad8494fd636236ca45c5d71bc26e4a87a5637643d82d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d1aa26e1e4021bbd70311ba9eef8174a34d2b1e41b56db6dd6e80dd0a7584. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa06d9bb90cdc31a2ec733dae009907d59332aab6f17b643376f84cdf09cef0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84a7574473b8a24bb4b2b3d54943e3ba22d67af86c727f7ca0770918b3d35d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c56f43dfbd0a15033e263305fa6c8709f6a9fa48f9c68a949ede4f40552c6a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6d9370e1e35ce8ebfc79c82753bdfd50d7c13031c037ff2404bc656a701dcf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e732d9b2b1e16f4dd9df2938a6639e332760e1a5486157f47f2e020b3aac2b3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3af224c2f055e026307c1f0504d40047dbb3ac6c37e6c87f2d41722192ce73. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1dab3d9a9eab4b5f9092006c8d22e12b89e2d09771263005504112e59d146a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1703607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a8262f96c5e020f886547d74c9d27eaec29d527d6c33c71d161b090f4a0d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502237860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e795e7c657ab6edd87ced76582f7ef40c5723c513571b9988cf1ce5f9787b7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502237861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a2dc9650c36a05c05c7199a1ea19b29cfda454470ecd3acb48ddb09b5b9bf3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502237871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f12c52c091d006027327ec0ce1704296973b85f9c91d02b05de4996c939ac50. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282410966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be44de6cc761d857e027c65136553d40c56db541cf7ff166daeb8d833985623. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2302159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d4bc1e17040e57da69e5ba0192b4d93a07d24635e1151d65e53cbb9f8d586. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2154705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae90de1e1fd9bbb56f194fd88b3e96880f4dc376df0bc6133fea11f34fa308. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41715358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e48054b609aa577831c3ea8d2babafeec381f507dd3adf9e6a1fe81233790. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1683543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e169964f9d388e454c18792a957657dd47c77233c2684447a6c76ac8a9b2cc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1683544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdd8ac45fb4222116dc745f1622bfb313c4802bc66ccd3347faaac9380bcb05. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1683545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7a45cae9627affd1cef52c41ceca21259f623d5196855ea941f3dff6df5d5f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1683546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb699dea643e4718e4ffbebd8c6f7b74266540ec3c60eebf5eb698062757d9a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1636289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f15b5ca97e4f70b98a8c047383905e0140f746e97e10de548301d410f25524. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502237880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c857a437b5236d9a63a88f6c103e40cce7e3805fbd868ed3f7697890102a70. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SGB502237879.